So you are trying to do a reo. Cut back is when you go out to front of wave and cutback to the whitewash to get back to pocket of wave.
As said before, step back as soon as you drop in. Try to Feel the kick pad and arch support of tailpad on your bottom turn as a good bottom turn sets up for a great reo. When your half way up wave transfer weight to back foot and dig paddle in to push board around. At this point you can do two things-
1 - transfer weight to front foot and push back foot out to slide rear of board out to slide across lip. Or,
2- lean forward and head back down wave to set up for another bottom turn.
Heal side is the same but you have to commit to trusting diging in paddle to pivot on.
The AB turn on a dime and are very forgiving. Set up of feet position is everything prior to a move. Best of luck in adventures